CA457064A - Sonnerie sur frequence vocale - Google Patents

Sonnerie sur frequence vocale

Info

Publication number
CA457064A
CA457064A CA457064A CA457064DA CA457064A CA 457064 A CA457064 A CA 457064A CA 457064 A CA457064 A CA 457064A CA 457064D A CA457064D A CA 457064DA CA 457064 A CA457064 A CA 457064A
Authority
CA
Canada
Prior art keywords
voice frequency
ringer
frequency ringer
voice
frequency
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
CA457064A
Other languages
English (en)
Inventor
Brandt Walter
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Federal Telephone and Radio Corp
Original Assignee
Federal Telephone and Radio Corp
Publication date
Application granted granted Critical
Publication of CA457064A publication Critical patent/CA457064A/fr
Expired legal-status Critical Current

Links

CA457064A Sonnerie sur frequence vocale Expired CA457064A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA457064T

Publications (1)

Publication Number Publication Date
CA457064A true CA457064A (fr) 1949-05-31

Family

ID=35574803

Family Applications (1)

Application Number Title Priority Date Filing Date
CA457064A Expired CA457064A (fr) Sonnerie sur frequence vocale

Country Status (1)

Country Link
CA (1) CA457064A (fr)

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